402042 has 16 divisors (see below), whose sum is σ = 826272. Its totient is φ = 130320.

The previous prime is 402037. The next prime is 402043. The reversal of 402042 is 240204.

It is not an unprimeable number, because it can be changed into a prime (402043) by changing a digit.

402042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 1127.

It is an arithmetic number, because the mean of its divisors is an integer number (51642).

2⁴⁰²⁰⁴² is an apocalyptic number.

402042 is an abundant number, since it is smaller than the sum of its proper divisors (424230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402042 is a wasteful number, since it uses less digits than its factorization.

402042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 402042 is about 634.0678197165. The cubic root of 402042 is about 73.8057970931.

Adding to 402042 its reverse (240204), we get a palindrome (642246).

It can be divided in two parts, 40204 and 2, that multiplied together give a palindrome (80408).

The spelling of 402042 in words is "four hundred two thousand, forty-two", and thus it is an iban number.